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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
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  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Completes uterine growth initiated by estrogen and prepares the uterus for nourishment of developing embryo if pregnancy occurs - supports pregnancy by maintaining quiescent state of reproductive tract and suppresses mating behavior - prevents ovulat






2. (switzerland) 2nd in size and milk production - most muscle -






3. 30-38 hours after estrus cycle begins






4. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.






5. Prevent the cow from getting an infection from the calve






6. Provide nourishment for the developing sperm






7. Failure to have one testis (gonad) to descend






8. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.






9. 1. reproduction - 2. mastitis/udder problems - 3. low milk production - 4. soundness/poor feet and legs (living on concrete)






10. When she is pregnant in her last trimester because she needs the energy to carry around and deliver the calf. and when the calf is born because the cow needs the fat to be deposit it into her milk for the calf's energy stores.






11. 24 hours before end of estrus cycle






12. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






13. When are dairy cattle dehorned?






14. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.






15. 114 days






16. Animal which has been castrated after puberty






17. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co






18. Why Dairy calves are fed powdered milk.






19. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg






20. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed






21. Microscopic - make sure not sterile - very few bulls are actually tested






22. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).






23. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.






24. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %






25. What helps regulate spermatogenesis?






26. What about the sperm for a bull which has been castrated but still has testicles?






27. Front feet and head first. (except for hogs and dogs)






28. Birthing process (termination of gestation)






29. Milk ~305 days - dry 60 days prior to calving






30. Sperm is produced here






31. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg






32. 147 days






33. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.






34. Microscopic - make sure not sterile - very few bulls are actually tested






35. 1. brain function - 2. blood flow - 3. willing female






36. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.






37. Days which have increasing daylight hours

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38. Look for infection - split - and rupture of the penis






39. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)






40. Important 'landmark' during palpation






41. Check feet and legs - look for masculine traits in build such as crest and muscling






42. (male) pushes the testes outward toward the legs for a cool-down off of the body






43. 26 hours after estrus begins






44. Indicator of sperm production. the bigger the scrotal circumference the bigger volume of sperm because more seminal vesicles available to produce the sperm






45. What helps regulate spermatogenesis?






46. (male) Primary sex organ - produces sperm (male gamete) and male sex hormones - 2 total






47. 14-19 (17) days






48. Knife-loose ~1wk of growth. band-loose ~2wks of growth.






49. 265-285 days






50. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)